Neelie Kroes was born on 19 July 1941 in Rotterdam, Netherlands. Her father owned the transport company Zwatra.[1]

Kroes attended a Protestant grammar school in Rotterdam. She continued to a Protestant high school. In 1958 she went to study economics at the Erasmus University in Rotterdam. In 1961, Kroes was praeses of the R.V.S.V. (the largest Rotterdam sorority). She was also elected as a member of the University Council. After obtaining her Master of Science in economics in 1965, she became a research fellow at the economic faculty at that university. During this period Kroes was involved in the women's organisation within the VVD. In this period she also was member of the board of heavy transporting company "ZwaTra", the company of her father.

During her tenure as minister, she was involved in the so-called TCR affair, about the illegal sale of warships. She had also a business relationship with a tank cleaning company (TCR), which illegally received governmental subsidies.

After her time as minister Kroes became a member of the Rotterdam Chamber of Commerce, furthermore she served as a board member for Ballast Nedam (shipping), ABP-PGGM Capital Holdings N.V. (a joint subsidiary of the pension funds ABP and PGGM), NIB (an investment bank), McDonald's Netherlands, Nedlloyd, and Nederlandse Spoorwegen (the Dutch railroad company).

In 1991 she became chairperson of Nyenrode University, a private business school. During this period Kroes also was a member of the Advisory Board of the Prof.Mr. B.M. Teldersstichting, the scientific bureau of VVD.

According to her husband, Bram Peper, from 1993 to 2001 Kroes relied on astrologers and clairvoyants for personal and business advice. Until 2004 Kroes maintained an office in the castle of Jan-Dirk Paarlberg, a real estate mogul who was convicted to four and a half years in prison for money-laundering and extortion. One of the astrologers advising Kroes during that time was Lenie Drent, who had been providing business advice to Paarlberg for decades.[2]

Kroes has held and still holds many side offices, mainly in cultural and social organisations. She is chairperson of Poets of all Nations, the Delta Psychiatric Hospital and of the board of the Rembrandt House Museum. Also, she is was a member of several boards of commissioners, for instance at Nedlloyd (a shipping company) and Lucent Technologies (an information and communication technologies company).

In 2004 Neelie Kroes was appointed the European Commissionerfor Competition. Her nomination was heavily criticised because of her ties to big business and alleged involvement in shady arms deals. Kroes has tried to uphold her integrity; whenever she has to deal with issues concerning competition in branches of industry in which she used to be active as a board member, Commissioner McCreevy takes over her responsibilities. As of January 2006 this has happened in five cases.

Neelie Kroes made the Forbes' The World's 100 Most Powerful Women list multiple times: as number 53 in 2009,[4] 47 in 2008,[5] 59 in 2007,[6] 38 in 2006[7] and number 44 in 2005.[8] She is sometimes called "Nickel Neelie". She apparently earned her nickname because she's tough in the same vein as the UK "Iron Lady" Margaret Thatcher when dealing with competition issues.[9]

In 2009 she was transferred to another European Commissioner post, namely ICT and Telecom. She was also appointed as one of the vice-presidents of the European Commission.

In 2010 it was suggested that she would become prime-minister in the Netherlands, when Mark Rutte would stay in parliament due to difficulties in the formations in the new Cabinet. However, eventually Rutte became prime-minister.